For the given reaction,which of the following | vedclass

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(A) The reaction involves the reduction of dichromate $(Cr_2O_7^{2-})$ in acidic medium to chromium $(III)$ ions $(Cr^{3+})$,which are green in color.

Vedclass · Accepted Answer

$CO_2$

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(A) The reaction involves the reduction of dichromate $(Cr_2O_7^{2-})$ in acidic medium to chromium $(III)$ ions $(Cr^{3+})$,which are green in color.$Cr_2O_7^{2-} + 14H^+ + 6e^- 	o 2Cr^{3+} + 7H_2O$$SO_2$ and $H_2S$ are strong reducing agents that can reduce $Cr_2O_7^{2-}$ to $Cr^{3+}$,thereby changing the color of the solution from orange to green.$CO_2$ is an acidic oxide and does not act as a reducing agent in this context,so it cannot reduce $Cr_2O_7^{2-}$ to $Cr^{3+}$.Therefore,$CO_2$ is not used to change the color.

For the given reaction,which of the following is not used to change the colour of the solution from orange to green?
$K_2Cr_2O_7 / H^{+} + y \to Cr^{+3} + \text{Others}$
$(\text{orange}) \quad \quad \quad (\text{green})$

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For the given reaction,which of the following is not used to change the colour of the solution from orange to green?$K_2Cr_2O_7 / H^{+} + y \to Cr^{+3} + \text{Others}$$(\text{orange}) \quad \quad \quad (\text{green})$